| 单词 |
servo-motor |
| 释义 |
servo-motor
Also servomotor, servo motor.
[ad. F. servo-moteur (1873 in Littré Suppl.), f. L. servus slave + F. moteur motor.
In the official notice of the prize awarded in 1875 to the inventor, M. Farcot, the apparatus is called ‘servo-moteur ou moteur asservi’.]
An auxiliary motor, e.g. one used for directing the rudders of a Whitehead torpedo, or the reversing gear of a large marine engine. More widely, any device used as the motive element in a servo-mechanism.
1889Sleeman Torpedoes (ed. 2) 184 The servo-motor is the air-engine from which is derived the power to move the horizontal or diving rudders. 1902Bodmer Hydraulic Motors (ed. 3) 504 [In turbines] a so-called indirect-acting governor is almost invariably necessary, that is, a governor acting on the regulator through a relay, or as it is sometimes called, a ‘servo-motor’. 1932Jrnl. Iron & Steel Inst. CXXV. 642 The apparatus..makes use of the dilatations of the test bar to regulate the temperature of the furnace by means of a servo-motor. 1933Electrician 16 June 796/2 The servo-motor for controlling the vanes is located between the turbine and generator shafts, so that the coupling flanges of the respective machines form the lower and upper servo-motor covers. 1951Automobile Engineer May 199/1 A mechanically operated transmission brake functions as a servo⁓motor to apply pressure to the master cylinder of a hydraulic braking system. 1976Gramophone Sept. 510/1 A DC servo motor powers the movement of the arm. |
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